Ubuntu package management

If you have any heavy packages recently installed (and are going to wipe the system for any reason), you might look into

ls -l /var/cache/apt/archives

to see which might be restored to the same place to avoid repumping them.

A quick way to see which packages are related to something is

apt-cache search java

Another less quick but more detailed, also shows what is installed on your system, is

dpkg -l '*java*'

You may see what was installed and when (for maverick)

less /var/log/apt/history.log

or, less conveniently (for lucid)

less /var/log/apt/term.log

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